... equirements set out by the European Directives* The F type probe for measuring the thickness of non-magnetic coating ... any non-magnetic coating on Non-Ferromagnetic metal base (aluminum, brass, stainless steel, etc. ), like anodizing, varnish, paint, enamel, ... Range: 0 - 1250um; M, 0 - 50milPrinciple: F type-magnetic induction,NF type-eddy currentResolution: 1um0.1milsAccuracy: +/-(3%+2um) or +/-(3%+ ...